Unconditionally and statelessly encapsulate transport layer packets in UDP
packets and decapsulate UDP packets.
.TP
\fB\-\-decap\fP \fIprotocol\fP
Decapsulate to this protocol (number).
.TP
\fB\-\-sport\fP \fIport\fP
Encapsulate with the source port (number).
.TP
\fB\-\-dport\fP \fIport\fP
Encapsulate with the destination port (number).
